JPS6039492Y2 - starter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine starter having a magnetic switch, and more particularly relates to an improvement in the structure of the magnetic switch installation in such a starter.

Conventionally, the structure for attaching a magnetic switch to the starter body is to provide a screw hole in the magnetic switch body and a corresponding bolt insertion hole in the starter body (starter housing), so that the bolt is inserted through the hole. The structure in which the magnetic switch is fixed to the starter housing by screwing the bolt into the screw hole of the switch body (first structure), and the structure in which the magnetic switch is integrally connected to the body of the magnetic switch by mFH is that the bolt is inserted into the hole in the starter housing. In addition, a structure in which a nut is screwed into this bolt to fix it (second structure), or a structure in which a magnetic switch is fixed to a yoke of a starter motor (third structure) is known.

However, in the first structure described above, a screw hole is provided in the magnetic switch body, and a bolt is simply screwed into the hole, so there is a problem that water may enter the coil part inside the switch body from the screw hole part. Ta.

Of course, the problem of water intrusion could be solved by providing a flange on the switch body and providing a screw hole there, but this would lead to an increase in the size of the starter, causing problems in mounting it on the engine and increasing costs. Ta.

Furthermore, in the third structure, since the cylindrical magnet switch must be attached to the circle I-shaped starter motor, a dedicated member is required for attachment, leading to an increase in cost.

In contrast, the second structure described above is advantageous over other structures in that there is no risk of water intrusion into the coil portion of the magnetic switch, and no special mounting member is required.

However, this method had the following problems.

In other words, when installing a magnetic switch, it is necessary to engage the plunger with the pinion transition member (drive spring) inside the starter housing, but at that time, the plunger must be connected to the contacts of the magnetic switch. For integral, and therefore non-separable, plungers, mounting integral to the switch body would interfere with the bolt interfering with the starter housing to engage the plunger with the pinion transition member, and this engagement would normally be It was impossible.

For this reason, the plunger had to be constructed so that it could be separated from the main body of the magnetic switch.

Therefore, the present invention improves the starter housing mounting part in the second mounting structure so that even if the plunger is a non-separable magnetic switch, the plunger can be easily engaged with the pinion transition member. The above is intended for easy attachment to the starter housing.

An embodiment of the present invention shown in the drawings will be described below.

In FIGS. 1 to 3, the starter housing 10 includes a portion 11 mainly used for installing the starter motor, a portion 12 mainly used for installing the magnetic switch, and a portion 13 mainly supporting the armature shaft of the motor.
A starter motor 20 is attached to the starter motor attachment portion 11 by a well-known method.

An armature shaft 21 of this starter motor 20 traverses the inside of the starter housing 10 and is rotatably supported by an armature shaft support portion 13 via a bearing 22 at its tip.

Fitted into the armature shaft 21 is a spline tube 23 that is spline-engaged with the armature shaft 21, and a pinion 25 that is connected to the spline tube 23 via an overrunning switch 24.

A pinion transition member 30 is engaged with the outer periphery of the spline tube 23 for moving the pinion 25 forward together with the overrunning switch 24 and the spline tube 23 when the engine is started.

This pinion transition member 30 is a well-known one that includes a drive lever 32 that is swingably supported by the starter housing 10 by a pinion 31, and a drive spring 33 that is engaged with the lever 32.

Although not shown in detail, the lower end of the drive lever 32 is formed into a bifurcated shape, and is engaged with the spline tube 23 by being sandwiched between the legs of the bifurcated legs.

Further, the drive springs 33 are connected at a bent portion at the upper end, and are arranged in substantially the same form on both sides of the drive lever 32.

A magnet switch 40 is fixed to the magnet switch mounting portion 12 of the starter housing 10.

This magnetic switch 40 is also well-known and includes a switch body 41, a plunger 42, a coil inside the switch body 41, and a contact portion for controlling energization to the starter motor 20.

The plunger 42 is attracted when the coil is energized, and has a hook 43 at its tip, which is engaged with the upper bent portion 34 of the drive spring 33 forming the pinion transfer member 30.

The plunger 42 is here integrated with a movable contact (not shown), and therefore cannot be separated from the switch body 41.

Note that a rubber boot 44 is attached to the end face of the plunger 42, and its outer edge is sandwiched between the end face of the starter housing 10 and the end face of the switch body 41, thereby closing the gap between the switch body 41 and the plunger 42. is sealed to prevent water from entering the inside of the switch body 41.

Starter housing 10 of the magnetic switch 40
The switch body 41 is integrally connected to the switch body 41 by welding or the like, and is mounted using bolts 45.

In this installation, two bolts 45 are integrally connected to the outer edge of the end face of the switch body 41 at equal intervals (1806) in the circumferential direction, and each bolt 45 protrudes a predetermined length.

This installation corresponds to bolt 45 on starter housing 1.
Mounting seats 15 having mounting holes 14 are formed on both sides of the outer wall of the housing.

However, the magnet switch 40 is installed with bolts 45.
To install each, insert the nut 47 into the hole 14 through the spring washer 46, and then tighten the nut 47.
7 to the seat portion 15.

The seat portion 15 of the starter housing 10 is installed only at a location corresponding to the tip of the bolt 45 when the magnet switch 40 is normally installed. Wide recessed relief portions 16 are formed on both sides of the starter housing 10 near the switch 40, respectively.

Therefore, with the magnetic switch 40 installed,
The bolt 45 is installed so that it is exposed at the relief portion 16.

The relief portion 16 is designed to prevent the plunger 42 from being removed from the drive spring 33 during the installation work of the magnetic switch 40.
This is useful when engaging the

In other words, as shown by the two-dot chain line in Fig. 2, the installation is done using bolts 4.
5 in the relief part 16 (installation is done through the hole 14
(not inserted), the magnetic switch 40 is installed in a position close to the original condition, and in this condition, the magnetic switch 40 and its integral installation allow the bolt 45 to be tilted or moved downward in Figure 2. This allows the hook 43 at the tip of the plunger to engage with the drive spring 33.

Therefore, the length and width of the relief portion 16 are selected to allow such engagement.

In this case, with the pinion 25 advanced, and thus the upper end 34 of the drive spring 33 brought closer to the magnet switch, the size that allows the hook 43 to engage can be minimized.

In this way, by bringing the upper end 34 of the drive spring 33 closer to the magnetic switch 40 side, the hook 4
3 to the drive spring 33, the mounting bolt 1 integrally connected to the magnetic switch body 41
4 will not interfere with the bottom part 15 when installed.

The operation of the starter configured as described above is almost the same as that of a conventionally known starter.

The installation of the magnet switch 40 is also strong,
There is no problem.

In the above structure, since the magnet switch 40 is mounted by bolts 45 that are integrally connected to the switch body 41, there is no risk of water intrusion into the switch body from this part.

Further, by providing a boot 44 as necessary, water intrusion can be reliably prevented.

Moreover, as mentioned above, the bolt 45 is attached to the switch body 4.
Even in the magnetic switch 40 which is integrally connected to the switch body 41 and whose plunger 42 cannot be separated from the switch body 41, it can be easily attached.

That is, the pinion 25 is advanced to bring the upper end 34 of the drive spring 33 closer to the magnetic switch 40 side, and the magnetic switch 40 is tilted or parallel with the mounting bolt 45 positioned in the relief part 16 of the starter housing 10. By moving the
The hook 43 of the plunger 42 can be engaged with the drive spring 33 without interfering with the starter housing 12 with the mounting bolt 14 integrally connected to the magnet switch body 41, and then the mounting bolt 45 is inserted into the mounting hole. 14 and screwing in the nut 47 together with the washer 46, the pinion 25 is returned to the non-driving position (rest position) via the drive lever 32, and the magnetic switch 40 is moved into the starter housing 10.
It can be installed properly.

As a result of the above, according to the present invention, it is possible to provide a starter with a simple structure, excellent water resistance, and easy attachment of a magnetic switch.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view showing an embodiment of the starter of the present invention;
FIG. 2 is a front view of the main part, and FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. 10... Starter housing, 14...
・Installation is through hole, 15... Installation is in seat, 16...
... Relief part, 30 ... Zenion transition member, 4
0...Magnetic switch, 41...
Switch body, 42...Plunger, 45...
...Mounting with bolts.

Claims (1)

[Scope of utility model registration request] In a starter configured such that a magnetic switch having a plunger that is engaged with a pinion transition member is integrally coupled to a switch body and fixed to the starter housing by a bolt, the plunger is integrated with a movable contact and the magnetic switch is integrally connected to the switch body. In addition to being configured inseparably,
For the above-mentioned installation, for installation with a hole where a bolt is inserted, the seat is provided at a location corresponding to the tip of the bolt for the above-mentioned installation in the starter housing, and for the installation of the starter housing above, the seat is provided at a location corresponding to the tip of the bolt. When the plunger is engaged with the pinion transition member in the state where the pinion transition member is advanced to the pinion transition position on the magnetic switch side part, the above mounting is performed by tilting or parallel movement of the magnetic switch to which the bolt is integrally connected. A starter characterized by having a relief portion shaped to allow.